Definition of Isotopic mass
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Isotopic mass Definition from Science & Technology Dictionaries & Glossaries
General Chemistry Glossary
Isotopic mass Definition from Encyclopedia Dictionaries & Glossaries
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The atomic mass (ma) is the mass of an atomic particle, sub-atomic particle, or molecule. The protons and neutrons account for almost all of the mass of an atom. It may be expressed in unified atomic mass units; by international agreement, 1 atomic mass unit is defined as 1/12 of the mass of a single carbon-12 atom (at rest). When expressed in such units, the atomic mass is called the relative isotopic mass (see section below).
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